Hypodermic syringe



April 16, 1929 F. w. STEUER '1,709,691

HYPODERMIC SYRINGE original Filed. sept.Y 22, 1924 [zzz/EH10?" ifea ZZStfa er headv 15 serves as a stop to prevent with-I drawal from thebarrel. Upon the screw atiented FRED Wi STEUER, OF BOSTON,MASSACHUSETTS, ASSIGNOB TO (100K IABORATOEES;

INC., A. CORPORATION F DELAWARE.

nrronnnarxc SYRINGE.

y Application led September 22, 1924, Serial No. 739,010. Renewed anuary5, 19278.'

Thiswinvention ,relates to hypodermic4 i syringes, and among otherobjects aims to provide a conveniently loadedsyringe of the cartridgeholding type.

5 The invention may be understood by reference to one illustrativeembodiment shown in the accompargying drawings", in which.:

' Fig. "1 is an elevation of the syringe shown the same on an enlargedscale; and

' F ig. 3 is' an enlarged sectional view of'.

-the syringe shown open ffor loading.

It is to be understood that the illustrative -orm shown in the drawingsis simply a preerre'd embodiment ofI the invention; and v'that in thefollowing explanation of that specific form, the described details ofstructure and organization-are merelyl exemplary.

'Referringto the drawings, the syringe comprises a barrel 5, serving asa holderv'for f the cartridge 6, a'plunger 7 for dispensing themedicament from the cartridge, and 'a needle 8 secured to'the barrel,and arranged y.

cartrldge 1s secured 'against longitudinal to conduct "the vmedican'ientfrom the cartridge to the point ofinjeetion. To'facilitate insertionofthe cartridge,

the barrel 5 comprises two hinged sections 5, 5l? joined together at oneend, herein the Q30, needle-carryingend, by hinge 9. Conveniently thebarrel -sections are semi-cylindrical, so that they 'may togetherenclose the cartridge, asA shown inFig. 2. The barrel section 5b carriesa head 10 at one end providin an abutment for the pierceable end l11 o,the cartridge, and having a screwthreaded boss 12 providing a seat forthe needle enlargement 13, which is clamped in its seat by nipple 14.

The plungerv 7 slides through a head 15 secured upon barrel section 5"yand has the yusual handle 16 for cooperation with finger grips 17` onhead 15 when dispensing the medicament. vIt is vdesirable that the two45. barrel sections be locked together 1n car-l tridgeholding position,and `for this purpose headl 15 is movable relative to the vbar- Vrel endby meansl of screw threads 18 enrel section 5*. -An end flange`20 onscrew headi is secured an annular locking flange or cap 21 whosedimensions are such that when l,the screw head is advanced within thebar- Fig. 2 is a longitudinal sectional view of .is retracted 'farenough to gaged withinl acollar or nut 19 fast to bar-v -head 'is easilyadvanced or retracted', to lock -f or unlock the barrel, by means of theknurled portion 22.

In using the syringe, the

barrel is opened as shown 1n Fig. 3 andthe cartridge is laid in theiopenreceptacle'provided'by either of the semi-cylindrical barrel sections.Then the barrel. is closed and-thescrew head is turned to lock thebarrel sections. As the screw head advances within the' barrel, itengages the endI of the cartridge to thrust it Irmly against theabutment `head 10.(Fig. 2); and if the needle has been initially-sd'cured in position, the screw head completes piercing of the end plug 11.After the contents of the cartridge have been discharged through theneedle by the plunger, the car-- .tridge may be removed when the screwhead l y permit separation` of the barrel sections.

movement has been found to be of specil yalue when the syrmge is usedfor injectie s 1n tissue whichoers considerable resistance,

The feature of the invention byl which I e. g'., bony tissue. If vergreat pressure is exerted onth'e syringe p unger,l and if the ycartridgehas a slight longitudinal. play within the syringe, Vthe plug which ispierced by the needle may permit'loss of the medicament because of backmovement lof the glass cylinder of the cartridge 'responsive to theextremely high pressure onthe pierced. plug, which cannotlmove becauseof the cylinder vhead 10. But if the glass cart-ridge is clamped, asshown in Fig. 2, and if the glass walls are of proper. strengthfnoamount ofi pessurewhich the practitioner can exert onthe plunger -willcause loss of 'the medicas ment. L

Of course, it will. be understood that Athe term hypodermic is useddescriptively and 'useful not only for strictly hypodermic injections,but also for intraosseous,.intrav-` enous, intramuscular and otherinjections. 4

Obviously the present invention is not ref not as a limitation. Thesyringe shown -is los stricted to the particular embodiment there.-

'of herein 'shown'and described.' y Moreover,

it is not indispensable that all thefeatures of the invention be usedconjointlysince they 11o s may be employed advantageously in variouscombinations and subcombinations as de iined in the claims.

What-I claim is: 1. A hypodermic syringe comprising, in combination, asectional barrel constructed and arranged for lateral insertion of a.v

medicament-cartridge; means for holding a needle on the barrel; andmeans carried by one of said sections for'locking the barrel sectionstogether, said means thrusting the cartridge in the direction of theneedle and securing it substantially immovably within the barrel.V

2.A hypodermic syringe comprising, in

combination, a sectional, hinged barrel constructed and arranged to openlaterally `for lateral insertion of afmedicament cartridge; 'ascrew-threaded member on one barrel section constructed and arranged tolock the two posisections together incartrid e-enclosing) y the tion;and a plunger slidab y carried screw-threaded member for reducing theinterior volume of the cartridge to expel its contents.

1' 3. A hypodermic syringe comprising,iin'

combination, a' barrel composed ofvtwo mating longitudinal sectionswhich when brought 'together form a cartridge-enclosing chamber;

together form a'cartridgel-enclosing chamber Y". a hinge connecting thesections at lone end o the barrel; a screw-threaded barrel-sectionlocking member at the opposite end of the barrel; needle carrying meansat the hinge end of the syringe; and a plunger slidable through thelocking member.

` 5.`A hypodermie syringe com rising, in

combination, a barrel composed o two maty ing longitudinal sectionswhich Awhen brought together form a cartridge-:enclosing chamber; one ofsaid sections having an abutment head at one end against which thecartridge may bethrust; means on said head for supporting the hypodermicneedle; a hinge connecting the headV with the other barrel secs tion;and a plunger slidably carried by the barrel section last named.

.6. A hypodermic syringe comprising, in combination, a barrel com o'sedoftwo mating longitudinal sections w ich when brought together form acartridge-enelosin cham' ber .one of said sections having an a u tmentvhead at one end against -whichthe cartridge maybe th'ust; means onsaid' headfor supporting' the hypodermic needle; a hingeconnecting thehead with` the other barrel section; and a screw head carried bythebarrel section last named and constructed and arranged to `lock the twobarrel sections togetherand to enter the cartridge chamber to thrust thecartridge towards the needle.

7 A hypodermicsyringe com rising, in combination, a barrel composed olfJtwo mating longitudinal sections hinged together at one end andproviding a cartridge-enclosin ,chamber when brought together; and a locjat the end opposite to the hinge constructed and arranged to preventyseparation of the barrel sections; said 4lock comprising a nut 75 orscrew-threaded collar @ast to one rof the barrel sections at one end, anexteriorly threaded sleeve or head engaged within said collar, and`means secured to the head and designedto riitover the ends of thebarrel sections. f, Y

'8. A hypodermic syringe comprising, in combination, a barrel composedof complementary longitudinal sections which are hinged to 'each otherso that when they are S5 brought together they will forma longitudi-vnally divided cartridge-enclosing chamber; a'

'medicament cartridge; and a lock for the barrel sections which isconstructed and arranged-to be moved over the corresponding 9.0 ends ofthe barrel sections andy simultaneousl to ententhe end of the chamberaforesai thereby engaging the end of the cartridge and y thrusting itagainst the opposite end o-Kthe chamber to secure the cartridge againstlongitudinal movement.

,9.111 a cartridge syringe, a jointed car- V tridge-holding andoperating instrument havlng a lcartridge-operating plungerv andconstructed Yto be opened laterally rfor lateral 10 0 insertion of thecartridge andembodying in its breech end an axially-movable member inwhich the plunger is mounted adapted to lock, the `instrument in closedoperative condition.

10. In a cartridgesyringe, a jointed cartridge-holding and" operatinginstrument having in its breech endA a cartridge-operat-- ing plungerand constructed at its fore end to provide -a cartridge abutment and toac` commodate a cartridge-piercing canula, said 110 instrumentadapted'to be opened laterally for lateral'insertion of the cartridgeand embodying in its breech end means to thrust the cartridge againstsaid abutment and to lock the instrument in closed operative condition.

`11. In.avcartridge syringe,a jointed cartridge-holding and o erati-nginstrument havin in its breechen a cartridge-operating p unger andconstructed at its fore end to provide a cartridge-abutment and to ac`12 commodate azcartridge-piercing canula, saidv instrument adapted to beopened laterally for lateral insertion of tlie cartridge and embodylngiii its breech end an axially-movable .lockingmember or'locking theinstrument 1 25 closed operative condition. i 12. In a cartridgesyringe, a, jointed carltrid'ge-holdingv and operating instrument havingin its breech end a `cartridge'-operat ing plunger and `constructed atits forejend 13 to provide a cartridge abutment and to4 acplunger ismounted to bear on the butt end of the cartridge and force it forward'against said abutment.

14. In a cartridgesyringe, a jointed cartridge-holding and operatingAinstrument having in its breech end a cartridge-operating plunger andconstructed at its fore end to provide a cartridgev abutment and toaccom modate a cartrid e-piercing canula, said instrument adapte to beopened laterally for lateral insertion of the cartridge and embodyin aplunger-carrying breech-head having loc ing means .to lock theinstrument in closed operative condition.

15. In a cartridge syringe, a jointed carj tridge-holding and operatmglinstrument having in its breech end a cartridge-operating plunger andconstructed at its fore end to provide a cartridge abutment and toaccommodate a cartridge-piercin canula, said instrument adapted to beopene laterally for lateral insertion of the cartrid e and embodyingaplunger-carrying breec '-head having locking means to' lock theinstrument inclosed operatlve conditi n and means to bear on the buttend of the c ridge and force it forward against'said abutment.

16. Ina cartridge syringe, a jointed cartridge-holding and operatinginstrument havin in its breech end a cartridge-operating p unger andconstructed at its fore end to provide acartridge Vabutment and toaccommodate a cartridge-piercin canula,-said instrument adapted to beopene laterally for lateral insertion of the cartridge and embodying inits breech portion screw-actuated means to force the cartridge forwardagainst said abutment and to lock'the instrument in closed operativecondition.

17. In a cartridge syringe, la cartridgeholding and operating mstrumenthaving in its breech end a cartrid e-operating plunger and-having itsfore `en g constructed to provide a cartridge abutment and to accpmmodate a cartridge-piercing canula, 'said 1nstru ment embodying hingedcomplemental cartridge-enclosin sections, the line of se arationbetweenw ich sections extend longitudinally ofi the instrument, whereby theinstrument canbe opened to permit' lateral insertion of the cartridge,and having a longitudinally movable locking sleeve adapted' to cooperatewith said sectionsto lock the instrument; in closed operative condition.

18. In a `cartridge syringe, .a cartridgeholding and operatinginstrument having in its breech end' a cartridge-operating plunger andhaving its fore en d' constructed-cto provide a cartridge abutmentand toaccommo-V date a cartridge-piercing canula, said instrument embodyinghlnged complemental cartridge-enclosing sections, the line of separationbetween which sections. extends longitudinally 'of the instrument,whereby the in- `strument can be opened to permit lateral insertion ofthe cartridge,and having axially adjust-able means to. force thecartridge against said abutment and to lock the instrument in closed'operative condition..-

19. In a cartridge syringe, a cartridgeholding and 4operating instrumenthaving in its-breech end a cartridge-operating plunger and having itsfore end constructed to provide a cartridge abutment and to vaccommodatea cartridge-piercing canula, said instrument embodying complementallongitudinal f cartridge-enclosingl sections hinged at one end of theinstrument and having locking means at the opposite end of theinstrument.

20. In a cartrid ev syringe, a cartridgeholding and .operatm'ginstrument having in its breech end a cartrldge-operating plunger andhaving a hinged fore 'head provlding a cartridge abutment and centrallyapertured 'to accommodate av cartridge-piercing canula,

said instrument comprising compl'emental longitudinal cartride-.enclo'sing sections, one carried by said head other section, said hined fore head and section carried thereby a apted to be 'swung out ofposition to permit lateral insertion of the cartridge, the instrumentembodying locking means to hold the parts inoperative relation after thecartridge is inserted.

21. A hypodermic syringe comprising, in

which is hinged to the combination, a sectional hln ed barrel; and

means for locking the hinge barrel sections together consisting of ahollow sleeve fitting J over both sections to lock the barrel' whenclosed, and means connected with the sleeve and screw-threaded on one ofthe barrel sections to move said sleeve longitudinally.

22. A yhypodermic syringe comprising, in

combination, a sectional, hin ed barrel; and

means for locking the hinge barrel sections l together consisting of ahollow sleevey and an actuating memberi engaged by screw. threads withone of thehinged sections of the barrel, said sleeve lock actuatingmember, when -turned'gso as to lock the barrel, enga ing a cartridge ofmedicament placed within the barrel y and thrusting the cartridge towardthe opbsitend of the instrument.

23:. :,hypodermic syringe comprising, in

g barrel head controlled by said screW-threadv combination, a sectionalbarrel; one of the barrel sections having a rotatable barrel head; ascrew threaded member secured to the rotatable barrel head and to theend of said section, saidl screw-threaded Amember being hollow axiallyto provide a slideway for the syringe plunger; and'means onthe ed memberandconstructed and arranged'to engage tHe sections of the barreltoprevent separation thereof in use.,

24.*A hypodermic syringe comprising, in

combination, a sectional barrel constructed and arranged to holdacartridge of medicamentg Ao ne ofy the barrel sections having at one endan internally-4screw-threaded ring;

a member screw-threaded within' said ring and having an axial passagefor the syringe ingv a medicament cartridge; one of the barlrel sectionshaving at one end an vinternaly screw-threaded ring; a member screwthrea ed Within said ring and having an -axial passage for the'syringeplunger; a locking sleeve carried by the screw-threaded member to bemoved over the ends of the barrel sections to hold them together; thescrew-threaded meinber being constructed and arranged to engage one endof the cartridge when turned toward barrel-locking position; and anabutment at the other end ofthe same barrel sectionagainst which thecartridge is thrustl by said screw.

26. An instrument of the class described comprising, in combination, acartridgeholder longitudinall complemental hinge sections, one of saidsections having a breech head and plunger and associated means embodyingan axially adjustable screw for locking the sections/in closed or'cartridge-holding position.

In testimony whereof, I have signed my .name to this specification.

y Y FRED W. STEUER.

divided comprising

